/*
 * jPOS Project [http://jpos.org]
 * Copyright (C) 2000-2015 Alejandro P. Revilla
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.jpos.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

/**
 * Uses java.util.zip to compress an input file and store it to the given output. Only valid for single files, not directories.
 */
public class ZipUtil {

	public static void zipFile(File input, File output) throws IOException {
		FileInputStream in = null;
		ZipOutputStream out = null;
		try {
			in = new FileInputStream(input);
			out = new ZipOutputStream(new FileOutputStream(output));
			out.putNextEntry(new ZipEntry(input.getName()));
			byte[] buffer = new byte[4096];
			int bytesRead;
			while ((bytesRead = in.read(buffer)) != -1) {
				out.write(buffer, 0, bytesRead);
			}
			out.flush();
			out.closeEntry();
			out.finish();
		} finally {
			if (in != null) {
				in.close();
			}
			if (out != null) {
				out.close();
			}
		}
	}
}
